If it's true that the Planck length (1.616e-35 meters) is the smallest possible Length, [https://futurism.com/the-smallest-possible-length https://futurism.com/

If it's true that the Planck length (1.616e-35 meters) is the smallest possible Length, [https://futurism.com/the-smallest-possible-length https://futurism.com/the-smallest-possible-length] then so far as we'll ever know, space is quantized. When I think about that, I wonder if that 'quantization of space' is what determines the speed of light. And perhaps explains why inertial and gravitational mass are identical.